HST/FOS Observations of the QSO PG 1522+101

Details HST/FOS Observations of the QSO PG 1522+101 HST/FOS Observations of the QSO PG 1522+101

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aas...181.1113c&link_type=abstract

American Astronomical Society, 181st AAS Meeting, #11.13; Bulletin of the American Astronomical Society, Vol. 24, p.1136

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The bright QSO PG 1522+101 (V~ 15.7, zem=1.321) has been observed in the UV with a combination of the low and high resolution gratings of the FOS, and is detected down to approximately 520 Angstroms in the rest frame. The spectrum shows many absorption lines which are primarily Lyalpha forest lines. Strong emission lines are also seen, including Ne VIII lambda lambda 770, 780. Optical images from Lick Observatory show a bright galaxy at a projected separation of approximately 15 kpc (H0=50, q0=0). This galaxy has a redshift, z=0.121, based on both emission and absorption lines. Although the projected separation is smaller than the radii of the C IV and Mg II absorbing systems derived from the statistics of QSO absorption--line systems, and the galaxy clearly has a gaseous component, there is no significant detection of either C IV or Mg II absorption in the spectrum of the QSO. The upper limits to the absorption line equivalent widths are approximately 0.15 Angstroms. This suggests that emission--line galaxies like those found at the redshifts of some QSO absorption--line systems are not always efficient at producing absorption. This research is supported by NASA Grant NAG5--1630.

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